Abbott, A. C., 79

Achatinellidæ, 388, 399
Adams, C. C., 253

Adamsia, symbiosis with hermit crab,
237

Adaptation, 8-10, 396, 407, 408
Addison, T., 142

Addison's disease, 142

Adrenal bodies, 142
Adrenalin, 142, 145
Agar, W. E., 42

Agassiz, L., 353; on Tertiary flora, 364
Albinism, inheritance of, 293, 298, 313
Alcohol, derivation of, 102; hereditary
influence of, 312
Aldrich, 145

Algæ, 71, 174; symbiosis of, 238-240
Alimentary canal, of earthworm, 115,
116; of crayfish, 118, 119; of ver-
tebrates, 119-122; development of,
161-165

Allodape, social life of, 213

Alternation of generations, 178-184
Altmann, R., 16, 17

Alytes, care of eggs, 205

Amazon ants, effects of slave-making
habits, 223, 224

Amia, guarding eggs and young, 205

Amino acids, 18, 122, 125

Amitosis, 33, 37

Ammonia, 103, 104

Ammophila, instincts of, 204

Amoeba, 53, 56-62, 114-117

Amphibia, 120, 121, 129; development

of, 189-191, 193, 194, 358, 359;
distribution of, 378, 385, 386

Amphioxus, 134, 156, 334

Amphipoda, 203, 249

Amphithoë, lack of maternal instinct,
203

Anthrax, germs of, 73, 83, 92; protec-
tive vaccination for, 85, 86

Antiseptic surgery, 81, 82
Antitoxin, 89-91

Ants, 206, 219-225, 228, 232, 233, 238
Aorta, 125, 126, 351

Aortic arches, 123-125, 127, 351, 352
Apes, 231, 340-343, 371-373, 378

Aphids, parthenogenesis of, 200; rela-
tion to ants, 222
Arachnids, 239, 250
Archæopteryx, 361, 363
Archegonia, 179, 181
Archenteron, 161-164

Aristotle, on life, 9; teleology of, 13;
on evolution, 325
Arrhenius, S., 78
Artemia, 195, 200
Arteries, 124-127

Artificial parthenogenesis, 201
Artificial selection, 393-395, 405
Ascaris lumbricoides, parasitic habits of,
247

Ascaris megalocephala, chromosomes
of, 41

Aspidium felix-mas, life history of,
178-181

Assimilation, 4, 5, 105, 111

Asters, 34-36

Atavism, 292-294

Auricles, 124-126

Australian region, 376-383, 390

Avebury, Lord, on Amazon ants, 223,
224, 234

Bateson, Wm., on cell division, 38; on
laws of heredity, 270, 301

Bats, wings of, 338; distribution of, 378,
386, 388

Bayliss, Wm., 27, 146, 147

Bear animalcules, revival after dessica-
tion, 26

Bears, species of, 332

Bees, 206; solitary, 212, 213; bumble,
213, 232; hive, 192, 200, 215-217, 232
Behring, E. von, discovery of antitoxin,
89

Beriberi, cause of, 19

Berman, L., 146

Bernard, C., on vital activity, 1, 14, 24;

on glycogenic function of liver, 122,
123; on internal secretions, 141; on
anæsthesia of piants, 108

Bethe, A., olfactory reactions of ants,
233

Bichat, M. F. X., definition of life, 10
Bile, function of, 122
Bioblasts, 17
Biogenetic law, 349
Biology, defined, 1

Birds, 126, 207, 208; social life of, 228-
230; change of sex in, 287; secondary
sex characters, 289; fossil forms, 354,
361-364; distribution of, 378-380,
382-385, 388, 389

Birth rate, 420-426
Bladder worms, 246, 247
Blastopore, 157, 159, 160

Blastula, 156, 157, 159, 160
Blending inheritance, 295, 296

Blood, 53, 54, 122-129; corpuscles of,
53, 54, 124

Blood tests, 347, 348
Blumenbach, J. F., 284, 307

Böhm, A. A., and Davidoff, M. A., 54
Bone, 47, 48

Bonnet, C., views on preformation, 148
Borneo, fauna of, 380, 383
Borradaile, L. A., 253

Bos, J. R., experiments of heredity of
mutilations, 307

Bose, J. C., on response in living and
non-living, 8, 14

Boyle, R., on fermentation and disease,
81, 82

Brachiopods, fossil species of, 357, 359,
406

Brain, 49; in earthworm, 115, 136, 137;

in crayfish, 118; in vertebrates, 138,
139

Brauns, H., on Allodape, 213

Brehm, A. E., social sympathy in birds,
228, 229; in monkeys, 208, 231
Brewer, W. H., alleged transmission of
mutilations, 307

Brontosaurus, 360

Brown, A. P., Reichert, E. T., and, 18
Brown, R., 29

Brown-Sequard, C. E., on internal
secretions, 141, 142

Buffon, G. L. L., on evolution, 325
Bütschli, O., on structure of protoplasm,
16, 27

Bullowa, J. G. M., 27

Bumblebees, social life of, 213, 214
Burbank, L., production of new vari-
eties, 394

Burlingame, L. L., 147

Cæcum, 119, 343
Calkins, G. N., 79, 147
Calyx, 181, 183
Cambium, 96-98

Cambrian period, 355-357

Camels, geographical distribution of,
390; extinct species of, 370
Camp, C. L., iii

Campbell, D. H., 110

Candolle, A. de, on classification, 336
Cannon, W. B., internal secretion and
emotion, 142

Capillaries, 125, 126

Carbohydrates, 30, 53; composition of,
19; use of, 11, 49, 99–102, 119, 121–
123

Child, C. M., on metabolic gradients,
267, 268

Chimpanzees, similarity to man, 340,
341, 347, 348; fossil remains of, 371;
distribution of, 378
Chitin, 116, 133

Chlorophyll, 65-67, 95, 99-101, 240
Cholera, of fowls, 84-86
Chondriosomes, 32
Chordata, 334
Chromatin, 33-35
Chromomeres, 42

Chromosomes, 40-42, 64, 151-154, 170,
200; behavior in cell division, 34-37;
continuity of, 41-42; relation to
heredity, 277, 278, 281-289
Cilia, 43, 44, 130, 131
Ciona, self-sterility of, 202
Circulation, 123, 132; in plants, 99; in
earthworm, 123, 124; in insects, 124;
in vertebrates, 124-127
Classification, 332-337
Clausen, R. E., 301

Clepsine, protection of eggs, 203
Coagulation, 21-23

Codfish, skeleton of, 134, 135; fccundity
of, 393

Cœlenterates, 113, 114, 123, 127, 136,
211, 243

Colom, 115, 116, 130, 160, 162
Conurus cerebralis, 246

Color blindness, inheritance of, 288, 289
Colloids, 22, 52, 53, 61
Commensalism, 236, 237
Complementary factors, 292, 293
Conjugation, 65, 66, 168-175

Conklin, E. G., 157, 260, 261, 322, 427
Connective tissue, 47, 48, 165
Consanguineous matings, 297-299
Convoluta, symbiosis with algæ, 238,
239

Cross breeding, 186-188, 296
Crossing over, 281-283

Crustacea, 116, 133, 189, 202, 203,
249, 250, 257, 258, 337, 338, 357
Crystalloids, 22

Crystals, growth of, 5; regeneration of,
6, 7, 265, 266
Cuticle, 44, 45
Cuvier, G., 326
Cyanophyceæ, 71

Cynthia, development of isolated cleav-
age cells, 260, 261

Cysts, of protozoa, 60, 61, 66, 69, 175,
177, 244, 246, 247, 384
Cytoplasm, 30-40, 154, 155

Dahlgren, U., 54

Dandelion, dissemination of seed, 8;
opening and closing of flowers, 109
Daphnids, parthenogenesis of, 199
Darwin, C., 299, 325-330, 390; on
insectivorous plants, 109, 110; on
cross and self-fertilization, 185-187,
209; on sexual selection, 196–198; on
sympathy in apes, 208, 231; on inter-
relationships of organisms, 253; on
reversion, 292; on pangenesis, 303,
304; on the geological record, 355; on
geographical distribution, 376, 381,
386, 387; on natural selection, 392-
398, 401, 404, 405, 407, 408
Darwin, E., 299, 325
Darwin family, 299
Darwin's tubercle, 341

Davaine, C., on bacteria of anthrax, 83
Davenport, C. B., 409, 427

Davenport, C. B., and Muncey, E. B.,
inheritance of Huntington's chorea,
317, 318

Death, relation to life processes, 7, 23-25
Degeneration, 349-352
Dendy, A., 147

Dentalium, development of isolated
cleavage cells, 260

Desmids, 71

Erepsin, 122

Erlich, P., on transmitted effect of
poisons, 308

Escherich, K., on termites, 225, 227
Estabrook, E. A., mental defect in the
Juke family, 415

Ethiopian region, 376-378, 381, 390
Eudorina, life cycle, 68, 173-177
Eugenics, 411-426
Euglena, 59, 67

Eurypterids, 358, 359
Eustachian tube, 349

Evans, H. M., on vitamine E, 20
Evolution, 324 ff

Excretion, 57, 58, 111, 130-132
Exogenous stems, 97-99
Eyes, 192, 341

Eyelid, rudimentary third, 339, 340

Fibrillæ, 49, 50

Fibrovascular bundles, 96-99

Fierasfer, commensalism with holo-
thurians, 236, 237

Filial regression, law of, 299-301
Filterable viruses, 5, 73

Fishes, 124-126, 130, 134, 135, 189, 349–
352, 357-360

Fiske, J., meaning of infancy, 208, 209
Flagella, 65, 113, 174-177
Flagellates, 65-68, 174-177

Flukes, 243-245

Foraminifera, 62, 63, 133
Formaldehyde, 99
Fossils, 352 ff.'

Frogs, 51; development of, 157-165,
260; breeding habits, 189, 190, 193,
195; artificial parthenogenesis, 201;
on oceanic islands, 386

Fundulus, effect of salt solution on
development, 21, 301, 311; effect of
alcohol on germ cells, 312; chro-
mosomes of, 41

Fungi, 103, 239; reproduction of, 177,
178: symbiosis with algæ, 240, 241;

Gager, C. S., 110

Galapagos Islands, fauna of, 387, 399
Gallardo, A., 39

Galton, F., 299, 301, 427; on instincts
of wild cattle, 230, 231; on law of
ancestral heredity, 299, 300; on filial
regression, 299-301; on transmission
of acquired characters, 305; on nature
and nurture, 314; on heredity of
ability, 319, 322, 323; on eugenics,
412, 427

Gametes, of Hæmatococcus, 66, 168,
169; of malaria parasite, 69, 70; of
Volvox, 176, 177; of Pandorina, 175,
176; of Eudorina, 176, 177; in hered-
ity, 273-278

Gametophyte, 179–183, 189
Ganglia, 136-138

Garbowski, M. T., 262

Garrison, F. H., 93

Gastric juice, 117, 121

Gastrula, 156-160

Gates, R. R., 409, 427

Geddes, P., and Thomson, J. A., 209,
390

Gee, W., effect of alcohol on germ cells

of Fundulus, 312

Gemmules, 303, 304

Gene, 274, 277-279, 404

Genotype, 276

Genus, 332, 333

Geographical distribution, 374-390

George, H., on heredity and ability, 314
Geotropism, 105, 106

Germ plasm, 279; continuity of, 300,
304, 305

Germ theory of disease, 81-93

Gesell, A., on twins, 320-322
Gibbon, 371

Gill arches, 135, 349-352

Gills, 126-130, 164, 165, 350, 351
Gill slits, 130, 164, 165, 349–351

Glacial period, effects on distribution,
389

Glands, 116-119

Glucose, 102

Goring, C., heredity of tuberculosis, 317
Govaerts, D. A., 317

Grabau, A. W., 356, 357, 362, 390
Graham, T., on colloids, 22

Hinshaw, H. C., iii

Hippocrates, 80, 81

Histogenesis, 165

Histology, 43

Hive bee, eyes of, 192; instincts of,
215-217

Holarctic region, 376
Holman, R. M., 110
Holmes, O. W., 300

Holmes, S. J., 72, 93, 166, 209, 427

Homology, 135, 136, 338, 339